1x+7y+1z=740000
1x+3y=530000
You asked:
Solve the system of equations:\[\begin{aligned}1 x + 7 y + 1 z &= 740000\\1 x + 3 y &= 530000\end{aligned}\]
MathBot Answer:
The system of equations has infinitely many solutions.
$$\begin{aligned}x &= \frac{3 z}{4} + 372500\\y &= 52500 - \frac{z}{4}\end{aligned}$$
\(z\) is a free variable.